The rapid economic development has brought a great test to environment. Lead pollution is one of the more prominent environmental issues. Crops grown on land contaminated with lead not only limit their own growth and development, but also can transmit lead to humans through the food chain, posing a great threat to human health. Rice is one of the most important economic crops in China. It is very important to ensure the normal growth of rice and reduce the transfer of lead from root to aboveground.

Chitosan (CTS) is widely sourced, safe and non-toxic. It can regulate the growth and development of plants and improve the ability of plants to resist stress. It is an ideal material for alleviating lead poisoning in rice. In this study, Guangliangyou 676 was used as an experimental material to study the effects of different concentrations of chitosan on the growth and development of rice seedlings under water culture conditions. At the same time, the effects of exogenous chitosan on rice seedlings under lead stress were discussed. The growth and development, physiological and biochemical indicators, hormone content, lead accumulation, and the effect of ascorbate-glutathione circulation system were researched. This study provide theoretical basis and practical guidance for the study of rice lead poisoning regulation.